Collapsible egg carton



Nov. 21, 1933. M. BURGER 1,936,186

'COLLAPSIBLE nee CARTON Filed Sept. 15, 1931 Patented Nov. 21, 1933UNITED STATES COLLAPSIBLE EGG CARTON Martin Burger, Morris, 111.

Application September 15, 1931 Serial No. 562,905

1 Claim.

The present invention relates to cartons made of a single sheet ofcardboard or the like, adapted to be shipped in a completely flattenedform comprising only one thickness of material and be thereafter set upin carton form by the user; and it has for its object to improve cartonsof this type.

A further object of the present invention is to produce a simple andnovel one-piece carton, the lower portion of which is in the form of twotroughs arranged side by side.

The various features of novelty whereby my invention is characterizedwill hereinafter be pointed out with particularity in the claim; but,for a full understanding of my invention and of its objects andadvantages, reference may be had to the following detailed descriptiontaken in connection with the accompanying drawing, wherein:

Figure 1 is a side or front elevation of one of my improved cartons;Fig. 2 is an end elevation, on a larger scale; Fig. 3 is a section online 3, 3 of Fig. 2, showing only a fragment of the carton; and Fig. 4is a plan view of a fragment of the blank in a flattened condition.

Referring to the drawing, 1 and 2 represent the front and rear walls, 3and 4 two oppositely inclined sections of a bottom wall and 5a cover ofa one-piece carton. The end walls of the carton, of which only one isshown, are in the form of wings or sections 6 hung at their uppercorners from the top of the carton at the front and rear, respectively.The connection between the end walls on the front wall is through smalltriangular sections '7, whereas similar triangular pieces or sections 8connect the end walls to a vertical strip 9 lying against the inner sideof the rear wall. This construction of end walls of a carton is old andwell-known, as it permits the end walls to be swung down from the planeof the top of the carton into positions at right angles to such plane.In accordance with my invention, the end walls are so shaped that theywill rest on the inclined bottom walls 3 and 4. Furthermore, each endwall has at its lower end a hook 10 projecting through a hole 11 in oneof the slopes of the bottom wall, thereby to hold the bottom wall up. Inother words, each end wall rests ontop of one of the bottom wallsections, and has a part extending underneath the other inclined bottomwall section, thus holding the end walls and bottom wall firmlytogether.

While the interior of the carton may be a single large chamber, I preferto utilize my improvements in connection with a cellular carton in whichthere are two rows of cells lying on opposite sides of the longitudinalcenter. Therefore, in addition to the flaps for the end walls or wings Iprovide as many flaps or wings as are needed to produce the desirednumber of cells in a single row; this also being a common expedient. asmany holes as there are' cross partitions and end walls, which end Wallsmay also be termed cross partitions; whereby'each cross partition willbe interlocked with and assist in supporting the bottom wall.

The cells or compartments, each extending from the front to the rearwall of the carton may be divided to form two sets or rows ofcompartments by means of a longitudinal partition 12. This longitudinalpartition may conveniently be made as a part of the single carton blank.Thus, in the arrangement shown, the strip 9 that supports the rear endsof the cross partitions, is of a height equal to the height of the rearwall of the carton. At the lower end of the element The bottom wall willof course have 9 and forming a continuation of thiselement, is section13 lying flat upon the inclined bottom section and extending along thesame to the longitudinal center of the' carton. The center longitudinalpartition forms a continuation .of the section 13.

Thelongitudinal partition is slotted downwardly through the upper edge,as indicated at 14, to receive the cross partitions andthus beinterlocked with the same.

The cover of the-carton is shown as being provided with a series oftongues 15, 16, 17, that are adapted tobe inserted through slits 18, 19and 20, in the' front wall of the carton when the coveris closed, tohold it closed.

While I have illustrated and described with particularity only a singlepreferred form of my invention, I do not desire to be limited to theexact structural details thus illustrated and described; but intend tocover all forms and arrangements which come within the definitions of myinvention constituting the appended claim.

I claim:

A carton of the type described, comprising a single blank outscored andfolded to form in the order named a longitudinal partition, a

